K 6型单层球面网壳的弹塑性稳定  

Elastic-plastic stability of K6 single layer latticed domes

作　　者：曹正罡[1] 范峰[1] 沈世钊[1] 

机构地区：[1]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《空间结构》2005年第3期22-26,共5页Spatial Structures

基　　金：国家自然科学基金重点项目(50338010);国家自然科学基金面上项目(50278020)

摘　　要：本文有计划地对1200余例实际尺寸的K 6型单层球面网壳进行了双重非线性全过程分析,求得了它们的极限承载力,系统地考察了初始缺陷和荷载不对称分布等因素对网壳性能的影响,并重点讨论了材料非线性对网壳极限承载力的影响.通过这种大规模参数分析研究,较全面了解了K 6型单层球面网壳弹塑性稳定性能的规律,在此基础上对以往仅考虑几何非线性的网壳极限稳定承载力实用公式进行了修正.Considering both geometrical nonlinear and material nonlinear, a complete-process analysis of more than 1200 K6 single-layer latticed domes has been carried out to obtain the critical load of the domes. The effect of initial imperfections and possible unsymmetrical action of loads on structural behavior are studied systematically, and the effect of material nonlinear on the critical load was also discussed. Base upon a comprehensive parametric analysis, the elastic-plastic stability behaviour of K6 single-layer latticed domes was understood, and then former practical formulas for predicting critical loads of real latticed dome structure, which considering only geometrical nonlinear, were revised.

关 键 词：单层球面网壳 稳定 极限承载力 弹塑性 

分 类 号：TU311.2[建筑科学—结构工程]